Type-writing machine.



F. C. JONESL TYPE .wmnivc MACHINE.

APPLICATION man APR. 14. m4.

- Pafentedl 10150521, 11915,.

' tllhlfl htm @TATEd PATENT l FRANK C. JONES, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO UNDEBWOOD TYPEWRITER COMPANY OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

PatentedDe-c. air, was.

Application filed April 14, 1914. Serial No. 831,689.

To all whom it may concern Be it known that I, FRANK C. JONES, a citizen of the United States, residing in Pl'iiladelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Type-lVriting Machines, of which the fol lowing is a specification.

This invention relates to a guard to prevent the vibrating ribbon of a writing machine from catching on the lower edge of a card or other work device, while writing close to the lower edge of such work device.

It is often desirable to place a line of writing very close to the lower edge of a card, and when the card is in position on the platen for receiving such writing, its lower edge is above the upper edge of the vibrating ribbon when the latter is in its lowered ornormal position of rest, and when a type key is struck, the ribbon is carried upward past the edge of the card and over the print-- ing point. If the edge of the card is not directly against the platen, or if there is a slight looseness in the ribbon, the latter, as it moves upward, is apt to foul with the card, thereby preventing the ribbon from being properly positioned over the printing point, and also tending to push the card upward out of position.

An object of the present invention is to overcome this ditficulty, and to this end a shield or guard is placed behind the rib bon vibrator in such position as to prevent interference between the ribbon. and the work device.

In the form of the invention illustrated, a card holder of usual construction, which is removably attached to the machine, is provided with thin sheet metal guards or wings projecting inwardly from the sides of the card holder, in such position that they'extend downwardbchind the ribbon and vibrator and in front of the card, to serve as a separator between the card'and ribbon, so that as the ribbon is carried up by the vibrator it is prevented from coming in contact with the edge of the card, when the latter is positioned to be written upon close to its lower edge.

Other features and advantages will hereinafter appear.

In the accompanying drawings, which illustrate my invention applied to an Underwood typewriting machine, Figure 1 is a perspective view, showing the platen frame and platen, the ribbon vibrator, and

the card holder with the present invention applied thereto. Fig. 2 is a detail perspective view of the card holder and type guide. Fig. 3 is an end elevation, showing the relat1ve position of the work member, card holder, and guard, and the ribbon vibrator and ribbon. Fig. l is a front elevation View,

2 journaled in the platen frame 3, and paper guiding fingers 4 are adjustably mounted on a rod 5 of the platen frame and adapted to engage the margins of a work-sheet andhold it in position on the platen. Key-actuated types- 6 strike upwardly and rearwardly against the front face of the platen, to print through the ribbon 7 which ismoved upward over the printing point at each type stroke by the usual mechanism comprising a ribbon vibrator or guide 8 through which the ribbon 7 is threaded. A type guide 9 (Fig. 2) may be mounted on the type-bar segment 10 in position to guide the types to the printing point. 1

A card holder 11 in the form of a U shaped wire, is adapted to be removably at tached to the segment 10 by inserting the ends of the card holder in sockets 12 in said segment; the card holder being thus positioned to hold cards or other work members on the platen. When the work member 13 is moved into position to receive a line of writing adjacent its lower edge 14-, as shown in Figs. 1 and 3, the edge H is above the upper edge of the ribbon 7. Unless provision is made to prevent interference between the ribbon and the work member. the ribbon as it is carried upward is liable to catch on the edge l-l of the work member, particularly if the latter is not held closely against the platen or if the ribbon is not stretched tightly through the guide. In order to prevent such interference guards or shields 15, which may be made of thin sheet metal, and which are shown in the form of wings attached to the sides of the card holder and extending inwardly, are placed in position on the card llOldtl to be interposed between the ribbon 7 and the Work member 13. As shown in Fig. 3, these guards 15 extend downwardly beyond the upper edge of the ribbon, so that the ribbon is never carried below said guards or into position to catch thereon. These guards also extend upward above the edge 14 of the work member 13 and hold the latter closely against the platen. As the ribbon 7 is carried upward during the type stroke it moves from the Fig. 4 position to the Fig. 5 position, the

. ribbon sliding over the guards 15 during this movement, The guards 15 also serve to hold the ribbon ofi the work member 13, and thereby prevent possibility of smudging, the space between the guards being but little more than the Width of the type.

Variations-may be resorted to within the scope of-the invention, and portions of the imfirovements may be used Without others.

aving thus described -my invention, 1 claim:

1. An attachment for a typewriting machine consisting of a U-shaped card holder, and sheet metal ribbon-guards attached to the sides of the card holder and extending inwardly, the inner ends of said guards spaced to accommodate a type-bar, to fend the top edge of the ribbon away from the bottom edge of the card.

2. The combination with a ribbon-vibrator and a platen, of a card-holder between the ribbon-vibrator and the platen and mounted at its lower end, below the ribbon, upon a support, and having at its upper end above the ribbon means to hold the card against the platen, and ribbon-guards distinct from the card-engaging portion 01. the card-holder and extending from the sides thereof toward each other behind the ribbon, to tend the upper edge of the ribbon away from the bottom edge of the card.

3. The combination with a ribbon-vibra- A tor and a platen, of a card-holding attachment in the form of an im'erted U, between the ribbon-vibrator and the platen, and having its legs attached to a support, and

operating at its upper end to hold cards 

